The sigma EF-500 DG Super ETTL-II, canon Dedicated flashgun is designed to
work with both AF 35mm SLR and Digital SLR cameras of popular manufacturers for
advanced flash photography. For bounce flash, the EF 500 can be tilted 90
degrees upwards and seven degrees downward for close-ups. Additionally, it can
be swiveled 180 degrees to the left and 90 degrees to the right. It
incorporates "modeling flash" mode to provide proper light distribution to
check the shadow of the subject.